Water hyacinth are good, easy to get out of the
pond for me (compared to water lettuce - but I've
got that too).
Winter will kill them but you really don't want them
in there by winter. A bunch of dead water hyacinth
will fuel a big algae bloom next spring so get them out
before the first frost, or shortly thereafter.

Sweater algae, or substrate algae, grows on surfaces
like rocks, plant baskets, liners. It gets an inch or two
long, is a nice green color and considered good for the
pond since it provides food and shelter for pond critters.

It also helps keep single cell suspended algae (green
pea soup colored water) and the long and tangling string
algae at bay.

kathy :-)
www.blogfromthebog.com
this week ~ Mosquitoes!
Run For Your Life!

Pond 101 page for new pond keepers ~
http://hometown.aol.com/ka30p/myhomepage/garden.html